Date: Wed, 20 Feb 2013 08:00:43 -0500 From: Fbsd8 <fbsd8@a1poweruser.com> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD questions <questions@freebsd.org> Subject: Re: sh script & files Message-ID: <5124C8FB.9070605@a1poweruser.com> In-Reply-To: <20130220134637.58d8a913.freebsd@edvax.de> References: <5124C428.1080909@a1poweruser.com> <20130220134637.58d8a913.freebsd@edvax.de>
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Polytropon wrote:
> On Wed, 20 Feb 2013 07:40:08 -0500, Fbsd8 wrote:
>> # write to file
>> > "${file}"
>>
>> I'm thinking the file is never closed so on power failure I loose the
>> contents of the file.
>>
>> How would I code a command to close the file?
>
> The file is closed when the write operation has been
> finished. You can use the "sync" command to flush
> pending writes to the file (as writing is handled
> asynchronously by the system). When the program
> that writes to the file exits, it will close the
> file it's writing to. This depends on the command
> you're using infront of >, as the command you've
> shown will simply generate a null file (file with
> no actual content).
>
>
The problem is there may be a great time lag between reading the file
and the writing to the file, IE: days or months depending on how long
between host reboots. I would just like to close the file right after
the file gets read.
Is there a way to code that?
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